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POUsing PrintWriter on an object in a class
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  1. POUsing PrintWriter on an object in a class
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    copied!<p>I have a class that test for the amount of money put into a vending machine. The initial values are stored in a txt file. I'm trying to use a printWriter to take the user input and store it in the txt file. For example, the starting amount of dimes is 5. The user puts in 2 dimes and the new amount in the text file is 7.</p> <p>This is all Money.txt has in it:</p> <pre><code>5 //nickels 5 //dimes 5 //quarters 0 //halfdollars </code></pre> <p>This is my money class: public class Money</p> <pre><code>{ private int nickels; private int quarters; private int dimes; private int halfs; public void increNickels() { nickels ++; } public int getNickels(){ return nickels; } public void increQuarters(){ quarters ++; } public int getQuarters(){ return quarters; } public void increDimes(){ dimes ++; } public int getDimes(){ return dimes; } public void increHalfs(){ halfs ++; } public int getHalfs(){ return halfs; } } </code></pre> <p>This is my vending class:</p> <pre><code> import java.io.*; import java.util.Scanner; import javax.swing.JOptionPane; import java.util.ArrayList; /** * * @author Mira and Ty */ public class VendingClass { Money moneyObj; public Item [] itemList; public Money [] moneyList; Integer noCode = null; int itemChoiceNum; public VendingClass(){ moneyObj = new Money(); itemList = new Item [4]; moneyList = new Money [4]; } public void setItemList() throws IOException { String welcome = "Welcome to the \n \t\tPolemon Distribution Center \n \t\t\tPlease note that if there is not enough \nmoney in " + "machine correct change \nwill not be given."; // creates welcome message JOptionPane.showMessageDialog(null, welcome); int itemQuantity; //variable that will display item code String items; //creates the String variable items which elements from itemNames array will be stored into int itemCost; //creates the integer variable itemCost whic elements from itemCosts array will be stored into File itemFile = new File("items.txt"); Scanner itemScan = new Scanner(itemFile); int code = -1; for(int x = 0; x &lt; itemList.length; x++){ //for loop addes the elements of each array and itemCode to itemList object items = itemScan.nextLine(); itemCost = itemScan.nextInt(); itemQuantity = itemScan.nextInt(); itemScan.nextLine(); code++; itemList[x] = new Item(code, items, itemCost, itemQuantity); } itemScan.close(); } public void setMoney() throws IOException { File moneyFile = new File("Money.txt"); Scanner moneyScan = new Scanner(moneyFile); for(int x = 0; x &lt; moneyList.length; x++){ int nickels = moneyScan.nextInt(); int dimes = moneyScan.nextInt(); int quarters = moneyScan.nextInt(); int halfs = moneyScan.nextInt(); } moneyScan.close(); } public void displayVend(){ String itemChoice = JOptionPane.showInputDialog(null, itemList); itemChoiceNum = Integer.parseInt(itemChoice); if(itemChoice == null){ JOptionPane.showMessageDialog(null, "Thank you for your service. Goodbye!"); } JOptionPane.showMessageDialog(null, "You've caught a " + itemList[itemChoiceNum].getItem()); } public void insertMoney() throws IOException{ int moneyNeeded = itemList[itemChoiceNum].getCost();//price of item will be decremented while(moneyNeeded &gt; 0){ //while loop testing the amount of money added to vending machine String message = JOptionPane.showInputDialog(null, "Pokemon: " + itemList[itemChoiceNum].getItem() + "\n You owe" + moneyNeeded + "\nEnter 50, 25, 10, or 5"); PrintWriter mw = new PrintWriter("Money.txt"); int userMoney = Integer.parseInt(message); moneyNeeded = moneyNeeded - userMoney; if(userMoney == 5){ mw.moneyObj.increNickels(); } if(userMoney == 10){ mw.moneyObj.increDimes(); } if(userMoney == 25){ mw.moneyObj.increQuarters(); } if(userMoney == 50){ mw.moneyObj.increHalfs(); } if(message == null){ JOptionPane.showMessageDialog(null, "Thank you for your service. Goodbye!"); System.exit(0); } } JOptionPane.showMessageDialog(null, "Thank you for coming to the Pokemon Distribution Center! \nWe hope you and your " + itemList[itemChoiceNum].getItem() + " catch them all!"); } } </code></pre>
 

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